Treatment of sulfur recovery exhaust gas
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After passing through the flue gas incinerator used for sulfur recovery, our flue gas is also treated in two alkali scrubbing towers. Recently, due to a lack of alkali addition over an extended period, the sulfur dioxide levels in the exhaust gas increased suddenly; after adding alkali to these two towers, the sulfur dioxide levels dropped again. The temperature rise during the hydrogenation reaction and the air-fuel ratio in the earlier stage are both quite good. Is it related to the fact that our absorber lean liquid volume was reduced from 35t to 17t?
A decrease in the flow rate of the lean liquid will definitely affect the absorption efficiency!
It is related to alkali displacement as well as the flow rate of the lean liquid in the absorption tower.
The exhaust fluctuations are normal. What process is used for sulfur recovery?
The flow rate of acidic gas and system pressure can be checked. For comparison, or check the tower internals